Year	Number of
1990	5542.07
1991	5770.36
1992	6054.69
1993	6284.77
1994	6535.9
1995	6747.29
1996	6893.26
1997	7048.67
1998	7259.96
1999	7191.88
2000	7138.06
2001	7185.08
2002	7339.32
2003	7517.75
2004	7723.31
2005	8049.1
2006	8375.87
2007	8427.69
2008	8610.76
2009	8814.53
2010	9074.14
2011	9423.74
2012	9397.78
2013	9353.5
2014	9265.59
2015	9610.11
2016	9925.35